#include <iostream>
#include <string>
#include <regex>

using namespace std;

#define LOG(format, ...) do{\
        fprintf(stdout, "hello " format "\n", ##__VA_ARGS__);\
    }while (0)

int main()
{
    
    for (int i = 0; i < 10; ++i)
    {
        LOG("%s", "bite");
    }
    return 0;
}